Optics continuum最新文献_第10页

All-fiber spatial profile and polarization controller 全光纤空间轮廓和偏振控制器

Optics continuum Pub Date : 2023-06-23 DOI: 10.1364/optcon.476392

F. Ghorbani, F. Farman, A. Bahrampour

引用次数: 0

Comparison of internal boundary conditions for optical diffusion calculations considering reflection and refraction 考虑反射和折射的光学扩散计算的内部边界条件的比较

Optics continuum Pub Date : 2023-06-22 DOI: 10.1364/optcon.492445

Toranosuke Amano, Tomohiro Endo, Akio Yamamoto

{"title":"Comparison of internal boundary conditions for optical diffusion calculations considering reflection and refraction","authors":"Toranosuke Amano, Tomohiro Endo, Akio Yamamoto","doi":"10.1364/optcon.492445","DOIUrl":"https://doi.org/10.1364/optcon.492445","url":null,"abstract":"A method to treat the internal boundary condition in an optical diffusion calculation is proposed and is compared with the conventional methods. One of the existing internal boundary conditions is Haskel's method, which uses the effective reflection coefficient for partial currents. However, Haskel's method ignores incoming partial currents from the adjacent mesh in its derivation. As a result, the accuracy at the internal boundary is lower. This paper proposes a method to improve the accuracy by iteratively updating the effective reflection coefficient for partial current. The proposed method was applied to the benchmark calculations on a one-dimensional slab geometry and its accuracy was confirmed by comparing it with the reference solution obtained by the Monte Carlo code MCML, along with the previously proposed Haskel's method and Aronson's method. As a result, it was confirmed that the proposed method is more accurate than Haskel's method at the internal boundary and gives the same result as Aronson's method. The convergence of the effective reflection coefficient using iterative calculations in the proposed method was good.","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47975389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface Material Recognition through MachineLearning using Time of Flight Lidar 基于飞行时间激光雷达的机器学习表面材料识别

Optics continuum Pub Date : 2023-06-21 DOI: 10.1364/optcon.492258

D. Tafone, Luke McEvoy, Y. Sua, Patrick Rehain, Yuping Huang

引用次数: 0

Highly luminescent ultra-thin films with rare earth for plasmonic applications 用于等离子体应用的稀土高发光超薄薄膜

Optics continuum Pub Date : 2023-06-20 DOI: 10.1364/optcon.489698

John Munga, Chi-Shin Yang, M. Rab, T. Shahbazyan, M. Durach, M. Noginov, N. Noginova

引用次数: 0

Systematic comparison of head mounted display colorimetric performance using various color characterization models 使用不同颜色表征模型的头戴式显示器色度性能的系统比较

Optics continuum Pub Date : 2023-06-14 DOI: 10.1364/optcon.493238

Ujjayanta Bhaumik, F. Leloup, Kevin A. G. Smet

{"title":"Systematic comparison of head mounted display colorimetric performance using various color characterization models","authors":"Ujjayanta Bhaumik, F. Leloup, Kevin A. G. Smet","doi":"10.1364/optcon.493238","DOIUrl":"https://doi.org/10.1364/optcon.493238","url":null,"abstract":"The advancement of virtual reality in recent times has seen unprecedented applications in the scientific sphere. This work focuses on the colorimetric characterization of head mounted displays for psychophysical experiments for the study of color perception. Using a head mounted display to present stimuli to observers requires a full characterization of the display to ensure that the correct color is presented. In this paper, a simulation is done to mimic a practical display with color channel interactions and characterization of simulated data is done using the following models: gain offset gamma model, gain offset gamma offset model, gain gamma offset model, piecewise linear assuming chromaticity constancy model, piecewise linear model assuming variation in chromaticity, look-up table model, polynomial regression model, and an artificial neural network model. an analysis showed that the polynomial regression, artificial neural network, and look-up table models were substantially better than other models in predicting a set of rgb values, which can be passed as input to a head mounted display to output desired target xyz values. both the look-up table and polynomial regression models could achieve a just noticeable difference between the actual input and predicted output color of less than 1. the gain offset gamma, gain offset gamma offset, and gain gamma offset models were not effective in colorimetric characterization, performing badly for simulations as they do not incorporate color channel interactions. the gain offset gamma model was the best among these three models and the lowest just noticeable difference it could achieve was over 13, clearly too high for color science experiments.","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45149407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PDTANet: A Context-guided and Attention-aware Deep Learning Method for Tumor Segmentation of Guinea Pig Colorectal OCT Images PDTANet:一种上下文引导和注意感知的豚鼠结肠直肠OCT图像肿瘤分割的深度学习方法

Optics continuum Pub Date : 2023-06-06 DOI: 10.1364/optcon.493630

Jing Lyu, Lin Ren, Qi Liu, Wang Yan, Zhenqiao Zhou, Yueyan Chen, Hongbo Jia, Yuguo Tang, Min Li

引用次数: 0

Degree of Polarization of Luminescence from InPunder SiN stripes: Fits to FEM Simulations InPunder SiN条纹发光偏振度的有限元模拟

Optics continuum Pub Date : 2023-06-02 DOI: 10.1364/optcon.481902

D. Cassidy, J. Landesman

引用次数: 0

Dispersion study of a broadband terahertz focusing reflecting metasurface for 6G wireless communication 6G无线通信宽带太赫兹聚焦反射超表面色散研究

Optics continuum Pub Date : 2023-06-02 DOI: 10.1364/optcon.493627

Fahim Ferdous Hossain, John F. OHara

{"title":"Dispersion study of a broadband terahertz focusing reflecting metasurface for 6G wireless communication","authors":"Fahim Ferdous Hossain, John F. OHara","doi":"10.1364/optcon.493627","DOIUrl":"https://doi.org/10.1364/optcon.493627","url":null,"abstract":"In 6G wireless communications, functional terahertz reflecting metasurfaces are expected to play increasingly important roles such as beamforming and beamsteering. However, their performance optimization as a function of multiple competing design parameters remains a significant challenge. This paper demonstrates a multi-dimensionally optimized design of a functional and efficient focusing metasurface reflector in the burgeoning D-band (0.11-0.17 THz). In addition to achieving 20% fractional bandwidth (0.135-0.165 THz), this design is polarization-maintaining, diffraction limited, simple in design, and exhibits 64.1% broadband power efficiency (1.9 dB insertion loss). We perform a unique study of the magnitude of temporal (group-delay) dispersion introduced by this design to the broadband signal at the focus. Despite being formed by an array of highly dispersive resonators, the metasurface exhibits very low dispersion, which avoids pulse reshaping and its consequent limitations on achievable data rate. The low dispersion characteristic of the metasurface is a consequence of its optimized design. The design and performance of the focusing reflector are presented followed by a dispersion analysis revealing that only 2.83% temporal broadening of the pulse is observed at the focus.","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41838134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

System analysis of common-path heterodyne polarimeter 共路外差偏振计系统分析

Optics continuum Pub Date : 2023-06-01 DOI: 10.1364/optcon.484697

Ming-Hung Chiu, Jun Lin

引用次数: 0

Spiking ruby revisited: self-induced periodic spiking oscillations leading to chaotic state in a Cr:Al₂O₃ laser with cw 532-nm pumping 重新审视尖峰红宝石：导致Cr:Al混沌状态的自发周期性尖峰振荡₂O₃ 532nm连续泵浦激光器

Optics continuum Pub Date : 2023-05-31 DOI: 10.1364/optcon.497640

K. Otsuka, S. Sudo

引用次数: 0